Honestly...how good was the 318...mpg / durability / hp

318willrun said

Mopar's "silent timing set" .... LOL :D :D .... If a guy put a steel set in there and still couldn't hear it. Cost saving using nylon if you ask me. The nylon gear sent a lot of really good small block mopars to the scrap yard.

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Exactly. The only sets I've ever heard had nylon coated gears. When the chains and nylon teeth wore real bad, the chain would start slapping the inside of the timing cover. I've seen a Buick 231 odd fire V6 wear a hole right through the timing cover.....but the engine was still running quite well. lol